Albert bandsept



No. 62!,783. I

Patented Mar. 28, I899.

A. BANDSEPT. INCANDESCENT GAS BURNER.

(Application filed Sept. 8, 1897.)

(No Modal.)

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I NCAND ESCENT GAS-BURN ER.

SPECIFICATION forming part of Letters Patent N0. 621,783, dated March 28, 1899.

Application filed September 8, 1897. Serial No. 650,953. (No model.)

To all whom it may conccrm,

Be'it known that I, ALBERT BANDsErT, of the city of Brussels, Belgium, have inventeda new and useful Improvement in Incandescent Gas-Burners, (for which I have ob tained a patent in Belgium, No. 124,988,.bearing date December 5, 1896, and additions thereto, No. 125,007, dated December 7,- 1896, and No. 129,205, dated July 2, 1897,) of which the following is afull, clear, and exact description.

My invention refers to Bunsen burners; and its object is to increase the quantity of air drawn in when burning town gas. This result I obtain by the combined action of gasjets proceeding from a central or from concentric perforations gradually tapering to a point,of air-inlets situated at different heights from the gas-jet and guided by truncated cones or enlarged tubes, and of an expansiontube the top of which-forming at the same time the top of the burner-is covered with one or more wire-gauzes, having fixed under or between them a baffle of conical shape.

In order to make my invention more clear, I refer to the annexed drawings, in which the same letters of reference denote similar parts throughout the different figures.

Figure 1 shows a section of a burner constructed according to my invention, in which I make use of a central gas-jet J and an annular jet J, situated at a lower level and issuing from a series of holes. The latter may be replaced by an annular slit J, Fig. 2, by making the gas-nozzle A of two parts so adj usted as to leave the required space between them for the passage of the gas. The gassupplied to the lower annular jet J on issuing from the nozzle A draws in air through openings E, made in the body of the burner beneath the cone or tube 0', and produces a first mixture of gas and air, while the higher central jet J increases the velocity of that mixture through the upper part of said cone, thereby producing an active suction of air through openings E. Above the cone 0 is fixed a diverging or expansion tube D, the top of which is provided with wire-gauze 00 vers G G, having fixed between them a battle B, of straight or curved sides, with its point directed into the ascending gas-current. This device has the effect of perfecting the mixture of gas and air just before entering into the flame. The cone 0 is fixed directly to the gas-nozzle and provided with the lower airinlets E, Fig. 1, or it may be fixed in a special cylindrical body F, Fig. 2, in which is secured the gas-nozzle A.

Fig. 3 shows a slight modification of the burner, in whichthe expansion-tube D is composed of two separable parts D D.

Figs. at and 5 are respectively an elevation and a section of a complete burner, showing the application of several truncated cones or tube-enlargements O G O at different heights and giving very good results even with a sin= gle central jet. These tube-enlargements are so arranged as to give to the air-draft the most" favorable angle for obtaining the greatest sucking and mixing effect. The latter may be regulatedby rings K, Figs. 2 and 3, surrounding the air-inlets and having corresponding openings. WVhen only one single wire-gauze cover. G, Fig. 5, is used, which should be of very fine mesh, the baffle B is socured under the same by means of a central plate L, Fig. 5.

in the combination of a gas-nozzle having a central and an annular perforation of inner tapered section, with a truncated conical airchamber surrounding the gas-nozzle and havin g air-inlets near its base, and a burner-tube of in creasing diameter toward both ends surrounding the air-chamber so as to form between itself and the air-chamber an annular air-space and having a central conical baflle secured under the wire-gauze which covers its top, substantially as set forth.

2. In an incandescent gas-burner having its gas-nozzle surrounded by a truncated conical air-chamber: a burner-tube of increasing diameter toward both its ends, composed of a plurality of parts each having a cylindrical portion and a funnel-shaped portion, the cylindrical portions so telescoped as to leave air- IO passages between them, substantially as set forth.

ALBERT BANDSEPT. Witnesses:

P. OORNUT, TH. WIESEMANN. 

